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Spike stitch

Instead of working into the two loops of the next stitch, work into the corresponding stitch in the row below the next stitch (1). Wrap the yarn over the hook and draw it through the stitch. You now have two loops on your hook. Wrap the yarn over the hook once more and pull it through both loops on your hook (2). You have now completed one spike stitch.

spike stitch instructions

These instructions are free to copy, share and adapt as long as they are not used for commercial purposes and as long as you link back to http://www.amigurumipatterns.net.